A consumer watchdog has found some slime products contain potentially unsafe levels of the chemical boron, which in excessive levels causes short-term bouts of diarrhoea, vomiting and cramps.

Boron is found in the compound borax, which is used to make slime thick and sticky.

However the European Chemicals Agency warns boron may damage fertility and cause serious eye irritation – and could cause harm to unborn children if pregnant women come into contact with it, shares daily mail.

Researchers tested the most popular slimes sold by major retailers and those recommended to children online.

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They found eight out of the 11 tested exceeded the EU safety limit for boron of 300mg per kg. Some were more than four times over the limit.

Nikki Stopford, director of research and publishing at Which?, said: ‘Parents buying slime for their children … will be shocked to find that the health of their children could be put at risk.’

Home-made slimes have previously raised concerns over borax, with reports that children have suffered injuries after trying to copy slime recipes found online.

But Which? is now calling for ‘fundamental changes’ to the product safety system after its tests.

Share your comments below

  • Uh oh, I gave my grandson a slime for his bday. It was a make your own kit, so maybe it’s safe. Will check it out though


  • Food colouring in clear glue or homemade paste might be a safer alternative.


  • My kids love slime, but I hate it ! Will show them this article.


  • My first child hated daycare with all their heart so we took them back home, and I switched to part-time job to keep an eye on them and prepare them to school. It actually worked.


  • Don’t know why they make this anyway. There’s so many other things for kids to play with.


  • Plenty of other things to play with. Just get rid of the slime.


  • This is worrying and I’m surprised it is allowed for sale knowing this!


  • My husband and I aren’t huge fans of it, but we take one for the team and let our Punks have it occasionally as it makes them happy. It’s so easy to make, though, so we also use it as an activity opportunity that we can do together.


  • Easy fix. Make your own! It’s fun making it as well as playing with it!


  • Oh dear. Know what’s not on the Christmas list from now on.


  • Wow, if a product has any reason to be unsafe, remove it. Simple.


  • Oh goodness! My kids all love slime! Me- not so much ????


  • Yeah i’m Not fond of slime. But I see why children love it. Just proof that sometimes you need to make these things at home to ensure it’s child friendly.


  • I don’t much like slim but this is very worrying.


  • They should be tested before they go on shelves to prevent this sort of thing happening.


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